Overview
This site is a free subnetting practice tool. It doesn't require an account, a login, or any personal information to use. This page explains what little data is involved when you visit, and how third-party services (like advertising) may handle information on their own.
Information we collect directly
We don't ask you to create an account, and there are no forms on this site that collect your name, email, or other personal details. The trainer runs entirely in your browser — the practice problems, your answers, and your streak count exist only in that browser session and are never sent to us or stored on a server.
Cookies & third-party advertising
This site may show ads served by Google AdSense. Google and its advertising partners use cookies and similar technologies to serve ads based on your visits to this site and other sites on the internet.
- Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and/or other sites on the internet.
- You can learn more about how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites.
- You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of third-party vendor cookies generally at aboutads.info/choices.
We don't control the cookies set by Google or any other advertising partner, and this policy doesn't cover how they use that data — see their own privacy policies for details.
Analytics
We may use privacy-focused analytics tools (such as Google Analytics) to understand general visit patterns — for example, how many people visit and which pages are popular. Any such data is aggregated and isn't used to identify you individually.
Third-party links
This site links out to other sites, such as GitHub, for contact purposes. Once you leave this site, that site's own privacy policy applies — we have no control over and aren't responsible for the practices of any third-party site.
Children's privacy
This site is not directed at children under 13, and we don't knowingly collect personal information from children. If you believe a child has provided personal information through this site, please contact us and we'll address it.
Changes to this policy
We may update this policy from time to time. Changes will be posted on this page with an updated date at the top, so check back occasionally if you're curious.